Pressure-gage.



l. H. SPENCER.

PRESSURE GAGE.

APPLIcAIIoN FILED MAI/5.19m.

Patented Apr. 29, 1919.

ENTOR.

ATTORNEY.

- WITNESSES:

III II ATE@ T CFFICE,

IRA E; SPENCER, OFWEST HARTFORD, CONNECTICUT, ASSIGNOR, yBY MESNE ASSIGN- MENTS, TO THE SPENCER TURBIN E COMP ANY, A CORPORATION OF CONNECTICUT.

PRESSURE-GAGE.

Specicaton of Letters Patent.

Patented Apr. 29, 1919..

ITo all 'whom t may concern:

Be it known that I, IRA H. SPENCER, a citizen o-f the United States, and a resident of West Hartford, in the county of Hartford and State of Connecticut, have invented a new andv Improved Pressure Gage, of which the following is a specification.

My invention relates to the class of devices above described and an object of my invent-ion, among others, is to provide a portable device in which liquid is used for determining the pressure and which shall be constructed to prevent the unintentional escape of the liquid.

One form of device embodying my invention, and in the construction and use of which the objects herein set out, as well as others, may be attained, is illustrated in the accompanying drawings, in which Figure 1 is a view in elevation of a gage embodying my invention with parts broken away to show construction.

Fig. 2 is a view in longitudinal section on plane denoted by dotted line 2-2 of Fig. 1.

Fig. 3 is a detail view in cross section through my improved gage on plane denoted by dotted line 3-3 of Fig. 2.

My improved gage is so constructed that liquid, as mercury, may be employed as the agent to denote the pressure, as it is provided with means for readily subjecting this liquid to the influence of atmospheric pressure, and at the same time is provided with means whereby the unintentional escape of the liquid is guarded against. While my improved gage is not limited in its use to any special purpose, as it finds ready application in determining the pressure in the conduits of pneumatic apparatus and especially in the hose and tools of cleaning de vices, I have shown, in the drawings herein, my invention as applied to a gage that may be used for this purpose.

In the accompanying drawings, the numeral 5 indicates a vacuum head containing avacuum chamber 6. This head may be constructed of any suitable material, and I have found that rubber, not perfectly rigid, but enough so to withstand any vacuum' to which the device will be subjected', will satisfactorily answer the purpose, and in fact, I believe this material to be superior to many others.

A body 7, preferably of a comparatively rigid material, extends through openings in both walls of the head 5, and hence through the vacuum chamber 6, the latter being thus formed into an annular chamber. The body 7, especially as to the projecting end 8 is of a size and form to be received within a hose or like conduit for air, and the opposite end of the tube is adapted to receive a plate 10 having an inlet opening 9. This plate is removably secured to the body for the purpose of enabling plates with inlet open-- ings of different sizes to be used. A number of ports 11 are formed through the walls of the body 7 within the vacuum chamber 6.

A pressure chamber 12 and an air inlet chamber 13 are also formed in the latter chamber having an air inlet port 14 and the former having a pressure port 15 extending between the vacuum chamber and the pressure chamber.

Holes 16, 17 are formed through the bottom walls of the chambers 12 and 13 and necks 18, 19 extend from the head and surround said holes. A vacuum tube 2O of the usual U-shape has its free ends inserted through the holes 16 and 17 and into the chambers 12 and 13. The open ends of the tube are located against the top of each of the chambers 12 and 13, so that the top of each of said chambers will close and seal the open ends of the tube under normal conditions, and in order to obtain suiiicient rigidity toeflect this resulting purpose, a filling 21 of metal or other comparatively rigid material is inclosed within the substance of the head and immediately over the open ends of the tube. A binder 22 of any substantial material may be secured around the necks 18 and 19 to attach the tube securely to the head.

A support 23, preferably of some resilient flexible material, as rubber, is secured to the lower end of the body to support the vacuum tube. The object of this flexible support is that it shall be movable so that the tube as a whole may be moved vertically, that is, so that its ends may be manually moved away from and automatically moved toward the tops of the chambers 12 and 13. The flexible and resilient support herein shown effectually accomplishes this, butv I contemplate as within the spirit and the head 5,

intent of the invention, any means of support of the vacuum tube whereby its open ends may be moved from or against the tops of the chambers 12 and 13, or, in fact, any means whereby spaces may be created between the ends of said tube and the tops of said chambers.

In the operation of the device, a plate 10 having an opening 9 of the desired size is placed upon the end of the body 7 and the opposite end 8 will be inserted into the chamber or end of the hose within which the pressure is to be determined. Force applied to the support 23, by reason of its flexibility and the iiexibility of the bottom walls of the head 5, will move it from its normal position as indicated in dotted lines in Fig. 1, and this will cause the ends of the vacuum tube to be moved away from the top of the chambers 12 and 13. The liquid, as mercury, which will be contained within the tube 20 will thus be subjected to the influence oi' atmospheric pressure and the pressure within the chamber or hose to which the gage is attached, and the mercury will thus determine in the usual manner the relative difference between these pressures.

The ports 11 are somewhat exaggerated in the drawings herein, as to size, in order to certainly show them, but it will be understood that in order to obtain the best and most accurate results, these ports will be very small.

In accordance with the provisions of the patent statutes, I have described the principles of operation of my invention, together with the device which I now consider to represent the best embodiment thereof; but I desire to have it understood that the device shown is only illustrative, and that the invention may be carried out by other means.

I claim'- 1. A gage including a body having a chamber therein, an indicating tube to contain a measuring medium and having communication with the interior of said body and also with the atmosphere, and self actuating means for closing one end of said tube to shut oil'.l communication with the chamber in said body.

2. A gage including a body having a chamber therein, a U shaped indicating tube to contain a measuring medium and having one end communicating` with the interior of the body and the other end communicating with the atmosphere, and self actuating means for normally closing one end of said tube to shut off communication with the chamber in said body.

8. A gage including a body having a chamber therein, a U shaped indicating tube to contain a measuring medium and having one end communicating with the interior of the body and the other end communicating with the atmosphere, and means, self actuating, to normally close an end of said tube to shut 0E communication with the chamber in said' body, said closing means being arranged or operation to open said end.

t. A gage including a body having a chamber therein, an indicating tube of curved form to contain a measuring medium and having one end communicating with the interior of the body and the other end communicating with the atmosphere, means for Sealing an end of said tube, a tube support, and means for causing relative movement between said sealing means and end of the tube to normally seal the lat ter to shut o communication with the chamber in said body.

5. A gage including a body having a chamber therein, an indicating tube of curved form to contain a measuring medium and having one end communicating with the interior of the body and the other end communicating` with the atmosphere, means for normally sealing an end o said tube to shut oil' communication with the chamber in said body and means for securing` the tube to permit the sealing and unsealing ofl an end thereof.

6. A gage including a body having a chamber therein, a U shaped indicating tube to contain a measuring medium and having one end communicating with the interior of the body and the other end communicating with the atmosphere, means for simultaneously sealing both ends of said tube, and means for causing relative movement between said sealing means and the ends of the tube to eect sealing and to permit unsealing of the latter.

7. A gage including a body having a chamber therein, a U shaped indicating tube to contain a measuring medium and having one end communicating with the interior of the body and the other end communicating with the atmosphere, a movably mounted support for said tube, and a sealing member mounted to receive the ends of said tube in one position to seal them.

8. A gage including a body having a chamber therein, a vacuum chamber communicating with said body, a pressure chamber comi'nunicating with the vacuum chamber, an inlet chamber communicating with the atmosphere, a U shaped tube with its ends projecting into said pressure and inlet chambers, and means for shutting oft pres# sure from one end of said tube.

9. A gage including a body having a chamber therein, a vacuum chamber communicating with said chamber, a pressure chamber communicating with said vacuum chamber, an inlet chamber communicating with the atmosphere, a U shaped tube having its ends extending into said inlet and pressure chambers to contact with the walls of said chambers, and means for causing relative movement of said walls and tube ends to seal the latter.

10. A gage including a body having a chamber therein, a vacuum chamber communicating with said chamber, a pressure chamber communicating with said vacuum chamber, an inlet chamber communicating with the atmosphere, a U shaped tube having its ends extending into said inlet and pressure chambers, the walls of which are flexible, and means for securing the tube to cause its ends to normally press against the walls of said chambers to seal the ends of the tube.

ll. A gage including a head having a vacuum chamber therein, a body having a chamber communicating with that in the head, a pressure chamber and an air chamber communicating with said vacuum chamber and the latter chamber communicating with the atmosphere, a U shaped tube extending through the walls of said head into said pressure and air chambers, and means for closing an end of said tube.

l2. A gage including a head having a vacuum chamber therein, a body having a iuid chamber communicating with that in the head, a pressure chamber and an air inlet chamber in said head, said chambers having flexible walls, the former chamber communicating with said vacuum chamber and the latter chamber communicating with the atmosphere, a U shaped tube extending through the walls of said head and with an end located to be closed by a wall of one of the chambers into which the ends of the tube extend, and means for causin relative movement between said wall and tue end.

13. A gage including a head having a vacuum chamber therein, a body having a fluid chamber and extending through said vacuum chamber, ports extending through the walls of said body into said vacuum chamber, a pressure chamber and an air inlet chamber in said head, the former communicating with said vacuum chamber and the latter communicating with the atmosphere, a U shaped tube having its ends projecting into said air inlet and pressure chambers, said tube.

14:. A gage including a head having a vacuum chamber, an air inlet and a pressure chamber, said air inlet and pressure chambers each having a flexible Wall, and said air and inlet chambers communicating with the atmosphere, and said pressure chamber communicating lwith said vacuum chamber, a body extending throu h said vacuum chamber and having a c amber therein, a port extending through the walls of said body into said vacuum chamber, a U shaped tube having its ends projecting into said air inlet and pressure chambers and with an end of said tube located to normally rest against the wall of one of said chambers, and means operatively connected with said tube and arranged to permit Hexing of a wall of one of said chambers to create a space between the end of said tube and a wall of said chamber.

l5. A head having a vacuum chamber, a pressure chamber and an air inlet chamber communicating with the atmosphere, a wall of each of said air inlet and pressure chambers being flexible, a body extending through said vacuum chamber and containing a chamber with ports extending through the wall of said body into said vacuum chamber, a U shaped tube with its ends extending through the flexible walls of said air inlet and pressure chambers, and with an end of said tube located to be closed by a wall of a chamber into which the end of the tube extends, and a flexible support for said tube.

16. A gage including a body having a chamber therein, a vacuum chamber communicating with said chamber in the body, a pressure chamber communicating with said vacuum chamber, an inlet chamber communicating with the atmosphere, a U-shaped tube having its ends extending into 'said inlet and pressure chambers to contact with the walls of said chambers, and means to effect and permit relative movement as between said walls and the tube whereby the ends of the tube may be sealed and unsealed.

IRA H. SPENCER.

and means for closing an end of Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

